In an accident, agent Long Yi was seriously injured and lost contact with the headquarters. Later, when he learned that his boss was the leader of the organization, he decided to give up his identity as an agent and become an ordinary person. Ordinary life begins with an ordinary courier job. Gradually, Long Yi began to pay attention to Suman, a girl who lived next door to him. Suman, who always came home early in the morning, did not leave a good impression on Long Yi at first. Later, a perverted murderer appeared in the city and targeted the cute Suman. Long Yi rescued her again and again, and finally the two got together.